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The Switch and Swap, located in CCAT's gray water marsh
CCAT greywater grease trap . The Campus Center for Appropriate Technologies (CCAT) is a student run organization that promotes sustainability through an environmentally responsible lifestyle. One way they demonstrate their mission to the public is through a greywater marsh system. A typical greywater system reuses effluent from bathroom sinks, showers, and laundry operations. The CCAT greywater marsh system is unique, because it incorporates kitchen effluent into the gray water system. The addition of the kitchen effluent requires the use of a grease removal unit, and a particulate filter. Design problems during previous attempts to address this issue have resulted in grease and stagnant water build up in the upstream surge tank and reduced efficiency in the downstream grease trap. In addition to reducing efficiency these problems have made the maintenance and operation of the grey water system difficult. Team VuTastic has been assigned the task of redesigning this system.

The original grease trap was designed with the condition that it should be cleaned regularly however accessibility issues led to grease build up and the effectiveness of the system was severely reduced.

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The new and improved Marsh
AEF greywater. For our final project we rebuilt a greywater system at the CSA, Arcata Educational Farm. Greywater consists of all used water produced at a particular site, except for water coming from the toilet, which is known as blackwater. When building a greywater system you first separate the greywater from the blackwater and send the greywater through a separate treatment system. Ideally, after the greywater passes through the purification process it will then be able to be reused. Greywater systems are an appropriate use of technology for many reasons. Some of them being: they reduce the use of fresh water, there is less stress on existing more conventional septic tanks, it is a highly effective purification process, and there is less chemical and energy use required. In our case the majority of water used on the farm is to water vegetables, herbs, flowers and fruits, and the source of greywater comes from the outdoor kitchen, used by the farmers and volunteers to cook and wash vegetables or dishes.
...Archive/Nominations

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Gathering cattails at Freshwater Farms
Millcreek greywater. With most American homes today, all used waters are flushed down the toilet and go on to the water treatment plant. Unfortunately, only some of those waters deserve such intensive treatment. Greywater is a small scale alternative, in which "greywater" from some parts of the used water supply is kept separate, kept onsite and introduced into a working biotic environment, which will break down this water into a safe, (though non-potable) reusable level. This "biotic" treatment is carried out by freshwater marsh plants, Cattails (Typha Spp.) and Rushes (Scirpus Spp.) ours uses Cattails native to this area, Thypha Spp. wild crafted with expressed permission from Fresh Water Farms. It is important to note that greywater does not include any fecal material. Fecal content renders a water to become blackwater.

This Engineering project is creating a residential greywater processor for a house of three persons. In so doing, our goal has been to become educated on the greywater construction process, analyze the pros and cons of previous greywater projects and implement a functional, economically viable greywater processor.

...Archive/Nominations

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Cookhousemodel with tank wetland
Samoa Hostel Greywater Island. The Greywater Island project is a proposed greywater treatment system for the Samoa Cookhouse and Hostel. As part of the sustainable operations of the Hostel, the greywater island functions as the largest implemented greywater treatment system in the restored facility. The greywater system was specifically designed under a criterion that would fulfill California state water quality standards, generate optimal functional capacities and require minimal maintenance and cost. the implemented greywater system was rendered by means of a custom made sizing calculator and graphical models of the design.

The historic Samoa Cookhouse will be the new host of an alternative lodging hostel where guests can engage in educational modules and experience the features and functions of sustainable design. The renovation of the Samoa Cookhouse hostel became a collaborative project in which Humboldt Bay Center for Sustainable Living and Danco took part to exemplify the resourceful opportunities available by restoring available structures using sustainable principles.

...Archive/Nominations

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Truth Tank implemented solution
The Samoa Hostel Truth Tank Greywater System was designed to provide a greywater treatment system for a satellite solar shower located on the grounds of the Somoa Hostel. The system was designed to follow California greywater standards while also meeting the criteria of the Humboldt Bay Center for Sustainable Living. After careful consideration of alternative solutions, a final design was chosen and constructed at a private home for testing before its eventual implementation at the Samoa Hostel in the spring of 2011.

The Humboldt Bay Center for Sustainable Living is constructing a hostel at the Samoa Cookhouse to serve as inexpensive lodging for travelers as well as an experiential education opportunity in sustainable living and historical restoration. The hostel will include campsites, which have their own solar powered shower facility. The greywater produced by the shower will be treated and disposed of by the Truth Tank Greywater System.The system will be tested by using it with a claw foot bath tub before moving it to the Samoa Hostel for use with the solar shower.

...Archive/Nominations

Portal:Greywater/Selected page/5

Marsh as of February 24th, 2009
The Campus Center for Appropriate Technology (CCAT)'s greywater marsh we inherited has been an on-going project since 2007 when it was relocated to its current location. It is a subsurface marsh off the southwest corner of the house. The greywater comes from the sinks, the shower, and the laundry machine inside the house. The original design had a settling tank first with a sock filter and a siphon system. The siphon was to draw water up out of the tank through the piping over to the second tank, which was about 15 feet away to the south located directly adjacent to the subsurface rock marsh. This second tank was to act as a surge tank. Please see the CCAT greywater marsh (2008) webpage to get the full description of the work that was done as of June of 2008. The current wetland portion of the marsh was left incomplete in anticipation of an end-use for the treated greywater. The surge and settling tanks were also left in need of final adjustments and appurtenances, such as a filter, secure lids, and the completion of the siphon system. Options for the use of the treated water include, gravity fed irrigation or pumping the filtered water into the rainwater catchment system tank for use on all CCAT landscapes and/or for greenhouse irrigation.
...Archive/Nominations

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The Switch and Swap, located in CCAT's gray water marsh
CCAT greywater grease trap . The Campus Center for Appropriate Technologies (CCAT) is a student run organization that promotes sustainability through an environmentally responsible lifestyle. One way they demonstrate their mission to the public is through a greywater marsh system. A typical greywater system reuses effluent from bathroom sinks, showers, and laundry operations. The CCAT greywater marsh system is unique, because it incorporates kitchen effluent into the gray water system. The addition of the kitchen effluent requires the use of a grease removal unit, and a particulate filter. Design problems during previous attempts to address this issue have resulted in grease and stagnant water build up in the upstream surge tank and reduced efficiency in the downstream grease trap. In addition to reducing efficiency these problems have made the maintenance and operation of the grey water system difficult. Team VuTastic has been assigned the task of redesigning this system.

The original grease trap was designed with the condition that it should be cleaned regularly however accessibility issues led to grease build up and the effectiveness of the system was severely reduced.

...Archive/Nominations

Portal:Greywater/Selected page/7

Outside view of Pizza Box under CCAT's kitchen sink.
CCAT kitchen effluent particulate filter. The Campus Center for Appropriate Technology contracted our team, The ECO-PLUMBERS through Engineering 215 Intro to Design at Humboldt State University in order to design a filtration system that would remove the particulate matter from their kitchen sink and improve the functionality of CCAT’s greywater marsh. To accomplish this, Team ECO-PLUMBERS used the five phases of the design process shown in the article.
  1. Project Formulation
  2. Problem Analysis and Literature Review
  3. Search for Alternative Solutions
  4. Decision Process
  5. Specification of Final Solution

As a result of the design process Team ECO-PLUMBERS designed constructed and implemented The Pizza Box a sustainable filtration device that is safe and effective.

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